<template>
    <div id="app">
        <p :style="{width:getWidth}" style="border: 1px solid black">我是子组件mycom2</p>
    </div>
    </template>
    <script>
export default{
    props:["childWidth"],
    computed:{
        getWidth(){
            return this.childWidth + "px";
        }
    }
};
</script>
<style>
</style>